#include<bits/stdc++.h>

#define int unsigned long long

using namespace std;

inline int read(){
    int x=0,f=1;char c=getchar();
    for(;(c<'0'||c>'9');c=getchar()){if(c=='-')f=-1;}
    for(;(c>='0'&&c<='9');c=getchar())x=x*10+(c&15);
    return x*f;
}

int ksm(int y,int z,int p){
    y%=p;int ans=1;
    for(int i=z;i;i>>=1,y=y*y%p)if(i&1)ans=ans*y%p;
    return ans%p;
}

int inv(int x,int p){return ksm(x,p-2,p)%p;}

int gcd(int x,int y){return (y==0)?(x):(gcd(y,x%y));}
int lcm(int x,int y){return (x/gcd(x,y))*y;}

int n,m;

void calc(int &x,int &y){
    int g=gcd(x,y);
    x/=g,y/=g;
}

signed main(void){

    freopen("fenshu.in","r",stdin);
    freopen("fenshu.out","w",stdout);
    cin>>n>>m;int p=read(),q=read();calc(p,q);
    for(int i=1;i<n;i++){
        int x=read(),y=read();
        calc(x,y);
        int r=p,s=q;
        q=s*y,p=r*y+s*x;
        calc(p,q);
    }
    for(int i=1;i<=m;i++)q*=read(),calc(p,q);
    cout<<p;if(q>1)cout<<" "<<q;puts("");

    return 0;
}